﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Services;

namespace Skyworth.CRM.Web.Service
{
    /// <summary>
    /// Summary description for $codebehindclassname$
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class ProductImages : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            context.Response.Charset = "utf-8";

            if( context.Request.QueryString["onCheck"]!=null && "Y"==context.Request.QueryString["onCheck"])
            {
                string strFileName=string.Empty;
                string strKey = string.Empty;
                foreach (string key in context.Request.Form.AllKeys)
                {
                    if (key != "folder")
                    {
                        strKey = key;
                        strFileName = context.Request.Form[key];
                        break;
                    }
                }
             
                string  strFilePath = HttpContext.Current.Server.MapPath("~/ProductImages/Images/" + strFileName);
                if (File.Exists(strFilePath))
                {
                    context.Response.Write("1");//"{\""+strKey+"\":\""+strFileName+"\"}");
                }
                else
                {
                    context.Response.Write("1");
                }
                
            }
            else
            {
                HttpPostedFile file = context.Request.Files["Filedata"];
                string uploadPath =
                    HttpContext.Current.Server.MapPath("~/ProductImages/Images") + "\\";
                string thumbnailPath=HttpContext.Current.Server.MapPath("~/ProductImages/Thumbnail") + "\\";

                if (file != null)
                {
                    if (!Directory.Exists(uploadPath))
                    {
                        Directory.CreateDirectory(uploadPath);
                    }
                    string strTimeInfo = DateTime.Now.ToString("yyyyMMddhhmmssfff");
                    string strFileName = strTimeInfo + "-" + file.FileName;
                    string imagePath = uploadPath + strFileName;
                    file.SaveAs(imagePath);

                    MakeThumbnail(imagePath, thumbnailPath + strFileName, 100, 100, "Cut");
                    context.Response.Write(strFileName);
                }
                else
                {
                    context.Response.Write("0");
                }  
            }

            
        }


        /// <summary>
        /// 生成缩略图
        /// </summary>
        /// <param name="originalImagePath">源图路径（物理路径）</param>
        /// <param name="thumbnailPath">缩略图路径（物理路径）</param>
        /// <param name="width">缩略图宽度</param>
        /// <param name="height">缩略图高度</param>
        /// <param name="mode">生成缩略图的方式</param>
        public void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
        {
            System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
            int towidth = width;
            int toheight = height;
            int x = 0;
            int y = 0;
            int ow = originalImage.Width;
            int oh = originalImage.Height;
            switch (mode)
            {
                case "HW"://指定高宽缩放（可能变形）
                    break;
                case "W"://指定宽，高按比例
                    toheight = originalImage.Height * width / originalImage.Width;
                    break;
                case "H"://指定高，宽按比例
                    towidth = originalImage.Width * height / originalImage.Height;
                    break;
                case "Cut"://指定高宽裁减（不变形）
                    if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                    {
                        oh = originalImage.Height;
                        ow = originalImage.Height * towidth / toheight;
                        y = 0;
                        x = (originalImage.Width - ow) / 2;
                    }
                    else
                    {
                        ow = originalImage.Width;
                        oh = originalImage.Width * height / towidth;
                        x = 0;
                        y = (originalImage.Height - oh) / 2;
                    }
                    break;
                default:
                    break;
            }
            //新建一个bmp图片
            System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
            //新建一个画板
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
            //设置高质量插值法
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
            //设置高质量,低速度呈现平滑程度
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            //清空画布并以透明背景色填充
            g.Clear(System.Drawing.Color.Transparent);
            //在指定位置并且按指定大小绘制原图片的指定部分
            g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
            new System.Drawing.Rectangle(x, y, ow, oh),
            System.Drawing.GraphicsUnit.Pixel);
            try
            {
                //以jpg格式保存缩略图
                bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
            }
            catch (System.Exception e)
            {
                throw e;
            }
            finally
            {
                originalImage.Dispose();
                bitmap.Dispose();
                g.Dispose();
            }
        } 


        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}
